Knitting machine



M. WEINBERG Filed June 29, 1938 2 Sheets-Sheet 1 lNVENT R A I 9 6ATTORNEY Dec. 19, 193. M. WEIN BERG KNITTING MACHINE Filed June 29, 19382 Sheets-Sheet 2 W. 40.. 0 F Y I Q Q JW x i @i O m %7 IAH V 8 x In. T w.n m M \1 w fl H 1 B u atented Dec. 19, 1939 PATENT OFFICE KNITTINGMAcnmE Max Weinberg, New York, N. Y., assignor to Max Weinberg Knitting00., Inc., Brooklyn, N. Y.

Application June 29, 1938, Serial No.- 216,536

5 Claims.

This invention relates to knitting machines. It is particularly directedto a machine for making knitted velvet, and the like purposes.

An object of this invention isto provide in a knitting machine of thecharacter described, means for knitting with a double yarn, means forproducing loops at spaced intervals with one of the yarns, and means forsplitting said loops during the knitting operation to produce a knittedvelvet cloth.

A further object of this invention is to provide a compact and ruggedmachine of the character described, which shall be smooth and positivein operation, easy to assemble, which will produce an attractive velvetknitted cloth, and yet. be I practical and eflicient to a high degree inuse.

Other 'objectsof this invention will in part be obvious and in parthereinafter-pointed out.

The invention accordingly consists in the features of construction,combinationsof elements, and arrangement of parts which will beexemplilied in the construction hereinafter described, and of which thescope of application will .be indicated in the following claims.

In the accompanying drawings, in which is shown one of the variouspossible illustrative embodiments of this invention,

Fig. 1 is a top, perspective view of a portion of a knitting machine,embodying the invention, with the sinker cam and presser bars removed;

Fig. 2 is an elevational, radial, cross-sectional view through a portionof the machine just after the yarn'is fed to the machine.

Fig. 3 is a view similar to Fig. 2, but illustrating the position wherethe knitting needles come down, and "the beard of the needle isclosed bythe presser bar, to pull down the. yarn on the sinkers;

Fig. 4 is an inside, elevational view of a portion of the machine whenthe knitting needles are in their downmost position, after casting 011one set of yarns and pulling down another set of yarns;

Fig. 5 is a view similar to Fig. 4, but showing the needles in theiruppermost position, after the needles have again been moved upwardly,and illustrating the cutting or splitting of a loop;

Fig. 6 is a view similar to Fig. 2, and illustrating the cutting of aloop;

Fig. 7 is a side, elevational view of' one of the regular sinkers;

Fig. 8 is a side, elevational view of one of the loop cutting sinkers;and

Fig. 9 is a plan view illustrating a piece of the knitted velvet madewith the machine embodying the invention.

Referring now in detail to the drawing, it designates a portion of acircular rotary knitting machine. The same comprises an innercylindrical rotary needle ring H, and an outer cylindrical cam ring l2,spaced from the needle ring, and provided with cams l3 fixed thereto andprojecting toward said needle ring, for raising and loweringthe'knitting needles It in desired phase, as will appear hereinafter.

The knitting needles M are each provided with a vertical shank [5 havingan outwardly and .downwardly bent beard I6, at its upper end, and aradially outwardly projecting butt ll, at its lower end, adapted to beengaged by the cams it, for vertically moving the needles up or down.The knitting needles It are slidably mounted in spaced vertical slots itin the rotary needle ring ll, whereby said needles rotate about the amtof said ring.

Fixed to the upper edges of the outer fixed cylinder or ring [2 is aflat annular ring 2% e x t e n d i n g outwardly therefrom. Rotatablymounted on the ring 20 is a ring ill on which are slidably mounted aplurality of radial equally spaced sinkers 23 and 2 3, alternatingbetween the needles it. Thus, there is one sinker between each pair ofadjacent needles.

Two types of sinkers are employed, the regular sinker 23 shown in Fig.7, and the loop cutting or splitting sinker 2d shown in Fig. 8. Everyfourth sinker is a cutting sinker 2 1 for cutting or splitting loops, inthe manner hereinafter explained. Hence, between every pair of adjacentcutting sinkers 2 3 are three sinkers 23, which are not provided withmeans for cutting the yarn. The sinkers are slidable radially on member26 between needles id, in the manner, and for the purpose hereinafterappearing.

The sinkers 23 are flat and have a straight bottom edge 25 contactingthe top of the ring 2t. Each of said sinkers is provided with anupwardly extending projection 26 for engagement with a sinker cam, aswill be explained hereinafter. Each-sinker 23 furthermore has aprojection 28, formed at the inner end thereof, with a pair of V-shapedgrooves 29 and 30. The groove 29 is disposed above the groove30, andradially inwardly of said groove.

The sinker 24 is similar to the sinker 23, except that the top of theprojection 28 is cut away to form a curved knife edge or cutter 3|. Thesinker 24 hence has only one V-shaped groove 30, similar to theV'-shaped groove 30 of the sinker 23. All of the sinkers are disposed inmachine. I Fixed to the ring 2| in any suitable manner,

' and overlying the sinkers 23. 24, are sinker cams 34 formed with camgrooves 35 receiving the projections 26, for radially moving the sinkersinwardl'yf and outwardly in a predetermined" sequence or phase relativeto the up and down movement of the knitting needles l4 by the cams l3,as the needles and sinkers rotate about the vertical axis of themachine. Cams 24 may be made in similar, repeated removable sections,one of which operates with the portion or the machine shown in Fig. 1.

Within the space 38, between the needle rin II and the cam ring l2, andabove the cams l3, and in back of each needle I4, is a vertical presserbar 31, disposed between each pair of adjacent sinkers 23 or 24-. Theupper endsof the presser bars are normally held away from the beards itof the needles M, by an annular coil tension spring 38 engaging withinnotches 39 in the lower ends of said bars, in the well known manner.

Fixed to each section of the cam plate 24 Ba presser cam 40 adapted topress the upper ends of the presser bars inwardly to close the beards Iwhen the needles are pulled downwardly, as shown in Fig. 3 of thedrawings, to permit the needles to cast off the stitches already made.

The needles I4. as well as the sinkers 23, 24, and the presser bars 31,are disposed entirely around the cylindrical machine, and rotate aboutthe axis of said machine. The fixed needle cams, sinker cams, andpresser cams are repeated any suitable number of times around themachineto repeat the knitting operation as many times as yarn is fed to themachine.

In Fig. I there is shown one section of the machine indicating onecomplete phase 01. operation. In said figure. the presser bars andpresser cam have been omitted for the sake of clearness. In Fig. 1thereis shown a pair of yarns A and B ied to the machine at-repeatedintervals around the machine, the same number of times as the needlecams, sinker cams and presser cams are repeated. In said figure, thearrow indicates the direction of movement of the needles and sinkersaround the axis of the machine. The letters A and B indicate double yarnor threads fed to the machine at one phase, and A, 13' indicate threatkwhich were fed to the machine at a previous phase, it being understoodthat the action illus tion, and the upper ends of the presser bars areheldbackawayirombeardsl8,bythecoll spring 38.

As the machine and sinkers continue moving in the direction of the arrowof Fig. l, the-sinker cam34 movesthesinkersradlallyinwardly between theknitting needles [,4 to the position showninFlg.2oithedi-awings.Astheneedles and sinkers continue moving further, the needlecamlabetopulltheneedlesdownwardiy,

and the presser cam 40 moves the presser bars against the beards I6 01the needles, as shown in Fig. 3 of the drawinga'the yarns A and B beingcaught within said beards. As the needles continue rotating further theyare pulled downwardly to pull the yarns A and B out of the grooves 29and 30 of the regular sinkers 23, and the yarn A of! the cutting sinkers24. The yarns A and B are then pulled through the previousstitching madeby yarns A and B, during the casting oil operation. The yarn B is notpulled oil! the cutting sinkers 24 however, being looped presser cam islocated at the place where the knitting needles are pulled downwardly topermit the casting oil operation.

At the cast off point, the sinkers are pulled back somewhat by thesinker cam to relieve the tension oi the thread during the casting oiIoperation. After the casting oii operation, the needles are again movedupwardly by the needle cam, and the sinkers are held in the positionshown in Fig. 3, until the needles reach the position shown in Figs. 5and 6 of the drawings, where the sinker cams are again pulled back sothat the inner upwardly curved portion of the cutting edge 3| of thecutting sinkersv 24, will sever the looped portions of the yarn Bresting on said cutting sinkers, to produce a pair oi cut ends 0 everyi.'ourth loop on yarn B. The cutting of the yarn is done at the pointmarked X in Fig. 1 of the drawings. v

Thereafter, the sinkers are pulled a little further back and twoadditional yarns are again fed to be engaged within the grooves 29 and30 of the sinkers 22, 24; and the action described above is repeated.

It will be noted that every fourth loop of one yarn is split during theknitting operation, the other yarn of the same loop serving to hold thecloth together.

Heretofore knitted velvet has been made by first knitting cloth withicon and thereafter removing the cloth from the knitting machine andcutting oil. the tops of the loops. With the improved machine disclosedherein, the cloth comes out. 7

Although the machine herein described illustrates three regular sinkers23 interposed between a pair of adjacent cutting sinkers 24 to producethree imcut loops of double yarn between each pair of cut loops, anysuitable number of sinkers 123 may be interposed between the cuttingsinkers, it merely being necessary to produce enough uncut stitches orloops between the cut loops s0 loops will not pull out between the cutloops.

some sections of the machine may be provided only with regular sinkersto make cloth having sections with uncut loops.

It will thus be seen that there is provided a device in which theseveral objects ofthis invention are achieved, and which is well adaptedto meet the conditions of practical use.

irom the machine with the loops already that the pieces of cut yarn Bbetween the split hill various possible embodiments might be made of theabove invention, and as various changes might be made in the embodimentabove set forth, it is to be understood-that all matter herein set forthor shown in the accompanying drawings is to be interpreted asillustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

i. In a circular, rotary knitting machine, a. cylindrical needle ring,means for rotating the same, a plurality of spaced knitting needlesmounted on said ring for vertical sliding movement thereon, cam'meansfor reciprocating said needles as said ring rotates with said needles,an annular ring fixed to said needle ring for rotation therewith,sinkers alternating with said needles, mounted on'said ring for radialhorizontal siiding movement, cam means to reciprocate said sinkers,certain of said sinkers having a pair of notches spaced, one .at ahigher level than the other, other sinkers located between a pair of thefirst sinkers having a notch similar to the lower oi the pair of notcheson said first sinkers, and a cutting edge above said notch and below thelevel of the higher notches in said first sinkers,

' means ior feeding a pair of yarns between said sinkers and needles,the lower notches of the first sinkers and the notches of the secondmentioned sinkers being adapted to receive one of said yarns, the uppernotches of said first sinkers being adapted to receive the other of saidyarns, the cutting edges of said second sinkers being adapted to movebeneath said second yarn and to out said yarn, upon reciprocating thesecond sinkers.

2. In a knitting machineior making knitted velvet, thecombination ofknitting needles having beards, means for reciprocating the same,

siers between said needles, means for recipro eating said sinkers in adirection transverse to the direction of reciprocation of said needles,Presser bars behind said needles, means for moving said presser bars toclose the beards of said needles, when said needles are moved downwardlyto cast ofi, means to feed a double yarn between said sers and needles,each of certain of said sinkers being provided with a plurality ofnotches to receive said yarns, each of other of said sinkers beingprovided with a cutting edge adapted to cut loops formed on one of saidyarns, and with a notch to receive the other yarn, there being one ormore sink'ers with double notches between each pair oi adjacent sinkerswith the cutting ees.

3. In a circular, rotary knitting machine, a cylindrical needle ring,means iorrotating the same, a plurality of spaced verticalknittingneedies formed with beards, mounted on said ring tor verticalsliding movement thereon, fixed cam means for reciprocating said needlesas said ring rotates, a fiat annular ring fixed to said needle ring forrotation therewith, horizontal sinkers disposed between each pair ofadjacent needles and mounted on said last mentioned ring for radialsliding movement, fixed means to reciprocate said sinkers horizontally,means for feeding a pair of yarns between said sinkers and needles, eachof certain of said sinkers having a pair of notches adapted to receivesaid pair of yarns, each of other of said sinkers located between a pairof said first mentioned sinkers, having one notch to receive one of theyards, and a cutting edge for cutting the other of said yarns.

4. In a knitting machine, a plurality of spaced knitting needles,sinkers alternating with said needles, means for reciprocating saidsinkers, certain of said sinkers having a pair of notches spaced one ata higher level than the other, the upper notch in each of said sinkersbeing spaced longitudinally from the lower notch, longitudinally of theother sinker, other sinkers located between a pair of the firstsinkers,-having a notch similar to the lower of the pair of notches ofthe first sinkers, and a cutting edge above said lower.

cylindrical, needle ring, means for rotating the same, a plurality ofspaced knitting needles mounted on said ring for vertical slidingmovement thereon, cam means for reciprocating said needles as said ringrotates, sinkers alternating with said needles mounted on said ring forradial sliding movement, cam means to reciprocate said sinkers, certainof said sinkers having a pair oi notches spaced one at a higherlevel-than the other, the higher level notches being located radiallyinwardly of the lower level notches, other sinkers located between apair of the first sinkers, each having a notch similar to the lower ofthe pair of notches on the first sinkers, and a cutting edge above saidnotch, means for feeding a pair of yarns between said sinkers andneedles, the lower notches of the first sinkers and the notches of thesecond sinkers being adapted to receive one of said yarns, the uppernotches of the first sinkers being adapted to receive the other of saidyams, the cutting edges 01' the second sinkers being adapted to cut saidother yarn upon reciprocating said second sinkers.

